【摘要】 根据中 -美合作协议 ,研究北极巴罗地区 2 0 0 0年以来气候和环境变化史 ,张青松和唐领余于 1998年 5 - 6月到阿拉斯加巴罗地区进行了为期 4周的野外考察。除湖泊打钻外 ,还在巴罗地区采集了表土花粉和植物标本。本文是研究北极巴罗 (Barrow)地区 12种冻原植物的花粉形态 ,它们的形状有球形、近球形、扁球形、茧形和四面体形 ,其萌发孔有三孔沟 ,三沟 ,二合沟以及散孔等类型。花粉具辐射对称和两侧对称两种类型。这些花粉的植物体是北极地区常见的植物 ,分属于 10个科 ,除三种为小灌木外 ,大多数为多年生或一年生草本植物。这些冻原植物花粉形态的研究为恢复北极地区古植被和古气候的研究 ,提供了有价值的对比资料和依据。更多还原

【Abstract】 Pollen morphology of 12 species of the tundra plants from Barrow, Arctic are investigated in the present study. The result shows that the pollen grains are mainly spheroidal, subspheroidal and oblate, cocoon-formed or tetrads. The types of aperture are mostly tricolporate or tricolpate, rarely pantoporate. They are radially or bilaterally symmetric. All these plants from which the pollen meterials were collected for this study are found to occur commonly in Arctic area, and belong to 12 species in 10 families. Most of them, except for 3 species which are bushes, are perennial or annual herbs. Investigation on pollen grains of tundra plants can provide significant data for comparative study of fossil pollen and for reconstruction of paleovegetation and paleoclimate in the Barrow area.更多还原